建项目

改pom，导入相关依赖

org.springframework.boot

spring-boot-starter-parent

2.2.2.RELEASE

<dependencies>
    <!--web依赖-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!--邮件发送依赖-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-mail</artifactId>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-test -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

写Yml，配置application.yml

server:

port: 端口号

spring:

mail:

#邮件发送配置

default-encoding: UTF-8

host: smtp.qq.com

# 授权码

password: 你的授权码

# 邮件发送安全配置

properties:

mail:

smtp:

auth: true

starttls:

enable: true

required: true

# 发件人信息

username: 发件人邮箱

主启动类EmailSignupApplication

/**

• @author QiuQiu&LL

• @create 2021-08-09 2:18

• @Description:

  */

  @SpringBootApplication

  @ComponentScan("com.qbb")

  public class EmailSignupApplication {

  public static void main(String[] args) {

  SpringApplication.run(EmailSignupApplication.class, args);

  }

  }

业务

1. 创建Service

/**

• @author QiuQiu&LL

• @create 2021-08-09 2:18

• @Description:

  _/

  public interface MailService {

  /_*

  • 发送邮件

  • @param to 邮件收件人

  • @param subject 邮件主题

  • @param verifyCode 邮件验证码

    */

    public void sendVertifyCode(String to, String subject, String verifyCode);

    }

1. 实现类ServiceImpl

package com.qbb.email_signup.service.impl;

import com.qbb.email_signup.service.MailService;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.mail.SimpleMailMessage;

import org.springframework.mail.javamail.JavaMailSender;

import org.springframework.stereotype.Service;

/**

• @author QiuQiu&LL

• @create 2021-08-09 2:20

• @Description:

  */

  @Service

  public class MailServiceImpl implements MailService {

  @Value("${spring.mail.username}")

  private String from;

  @Autowired

  private JavaMailSender mailSender;

  Logger logger = LoggerFactory.getLogger(this.getClass());

  /**

  • 发送邮件

  • @param to 邮件收件人

  • @param subject 邮件主题

  • @param verifyCode 邮件验证码

    */

    @Override

    public void sendVertifyCode(String to, String subject, String verifyCode) {

    SimpleMailMessage message = new SimpleMailMessage();

    message.setFrom(from); //发送人

    message.setTo(to); //收件人

    message.setSubject(subject); //邮件名

    message.setText(verifyCode); //邮件内容（验证码）

    mailSender.send(message);

    logger.info("已经发送");

    }

    }

测试

package com.qbb.email_signup;

import com.qbb.email_signup.service.MailService;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.boot.test.context.SpringBootTest;

import org.springframework.test.context.junit4.SpringRunner;

/**

• @author QiuQiu&LL

• @create 2021-08-09 2:28

• @Description:

  */

  @RunWith(SpringRunner.class)

  @SpringBootTest(classes = EmailSignupApplication.class)

  public class MailServiceTest {

  @Autowired

  private MailService mailService;

  @Test

  public void Test1() {

  /填你的测试信息/

  String to = "收件人邮箱";

  String title = "测试邮件";

  String context = "测试验证码";

  mailService.sendVertifyCode(to, title, context);

  }

}

结果